Returning objects

BlitzMax Forums/BlitzMax Programming/Returning objects

Leon Brown

(Posted 2007) [#1]

I've written the following method as part of my class:

	Method addLayer(id:String)
		Local layer: mapLayer = New mapLayer.Create(id,Self.width,Self.height);
		layer.id = id;
		'For Local rep:Int = 1 To 20
		'	layer.map[Rnd(Self.width),Rnd(Self.height)] = Rnd(1,3);
		'Next
		
		ListAddLast Self.layers,layer;
		Return layer	'-- allow layer object to be manipulated after creation
		
	End Method

You will see that I'm trying to return the created 'layer' object, but BlitzMax keeps telling me 'Function can not return value' - however, layers definately an object and works with everything else. Does anyone know why this is?

GfK	(Posted 2007) [#2]

Shouldn't that be Method addLayer:mapLayer(id:string) ?

Brucey

(Posted 2007) [#3]

Like what Gfk says.

If you want a method to return something, you need to tell it what you want to return... in the same style you use for saying what Type a variable is.

Leon Brown

(Posted 2007) [#4]

Thanks guys. I'm slowly getting there in picking up BlitzMax :-)

Brucey

(Posted 2007) [#5]

Interesting, reading the "Functions" bit out of the documentation...

It ReturnType is omitted, the function defaults to returning an Int

...except of course if you use SuperStrict, where you need to define the return type if you intend returning something.

Other than that, the section on Functions isn't too bad - if a little light on examples... ;-)